Abstract submitted to the
         XXXth International Conference on High Energy Physics
                July 27 - August 2, 2000, Osaka, Japan
_________________________________________________________________________




   Diffractive open charm production in deep inelastic scattering at HERA

                               ZEUS Collaboration





                                    Abstract


Open charm production in diffractive DIS has been measured with the
ZEUS detector at HERA using an integrated luminosity of 44
pb^-1. Diffractive interactions are identified by the presence of a
large rapidity gap in the final state.  Charm production is identified
by the reconstruction of D*+- (2010) mesons in the decay channels D*+
->(D0 -> K- pi+) pi+_s (+c.c.) and D*+ -> (D0 -> K- pi+ pi+ pi-) pi+_s
(+c.c.). The fraction of DIS D*+- events produced diffractively is
found to be sizeable.  Differential cross sections in several
kinematic variables are compared with the predictions of
phenomenological models.